Watc h - r eg u l ato r



(ModeL) J. P. STEVENS.

WATCH REGULATOR.

No. 264,787. Patented Sept. 19. 1882.

wmmssns mvnnrron 6. I BYCJL LMLQ ATTORNEYS;

UNITED STATES PATENT OFFICE.

JOSIAH P. STEVENS, OF ATLANTA, GEORGIA.

WATCH-REGULATO R.

SPECIFICATION forming part of Letters Patent No. 264,787, datedSeptember 19, 1882.

Application filed March 11, 1882.

To all whom it may concern:

Be it known that I, JOSIAH PERCY STE- VENS, of Atlanta, in the county ofFulton and State of Georgia, have invented a new and useful Improvementin atch-Regulators, of which the following is a full, clear, and exactdescription.

The object of my improvement is to obtain fine and accurate adjustmentof the regulating mechanism of watches; to which ends myinventionconsists in acam-groovcd wheel or dish fitted for moving theregulator-arm, as hereinafter described and claimed.

Reference is to be had to the accompanying drawings,forming part of thisspecification, in which similar letters of reference indicatecorresponding parts in both the figures.

Figure 1 is a face view of a watchplate carrying the improved regulatingdevices, showing the regulator-arm at one extreme of its movement; andFig. 2 is a similar view,sho\w ing the arm moved to the other extremeofits position.

A is the watch-plate, and a the pivot-bridge of the escapement-arbor, onwhich the regulator-arm b is titted, as usual.

0 is a circular disk or wheel, sustained on plate A by a pivot pin orscrew, d, so as to turn freely, and formed with a groove, c, of volutetorm,extending from the pivot d to near the outer edge of the wheel. Theregulatorarm b has its outer end bent to engage the groove 6, so that asthe wheel is turned the arm is moved to and from the center pin,d,l)ythe engagement of the arm with the slot.

On plate A is fixed a pointer,f, and the rim of wheel. 0 is toothed orserrated for the purpose of guiding the adjustment of the wheel withreference to the pointer.

The operation may be readily seen.

rne] (Model) movement of arm I) eifects the regulation in the usualmanner, and by the addition of the grooved wheel the arm can be moved toa slight degree and with uniformity not possible byhand.Thepointerindicatesonthewheelthc movements of the arm to a tinedegrec,so that the most accurate adjustment can he obtained. Theeccentric groove 6 is so constructed that by turning the disk 0 acertain number of degrees the rate of the watch will be increased ordiminished a certain number of seconds per day. For example, it" thewatch be gaining six seconds per day, turn the disk (1 two degreestoward the slow side of the indicator f, and the error in the rate ofthe watch will be corrected without further eXperiment-in this case twodegrees corresponding with six seconds of variation.

I am aware that it is not new to use an arm projecting from the side ofthe indicating-lever and provided with two pins working in a spiralgroove; butlsimplyprojecttheend ot'my lever into a curved groove,-(which does not lap upon itself,) so as to give an easy movement as wellas a positive action.

that I claim as new and of my invention is The combination, with thewatch-plate A, the regulator-arm I), having a bent outer end, and thepointer f, ofthe notched disk or wheel 0, supported on plate A by apivot screw or pin, (7, and provided with a volute groove, 0, extendingfrom the pivot to near the outer edge of the wheel,and adapted tooperate the regulator-1e vcr positively in both directions, as and forthe purpose specified.

JOSIAH PERCY STEVENS.

Witnesses: I

L. 0. Srnvnns, A. B. HARLOW.

